docs: add new consumer concept doc

[Annysah]

Description

• New concept doc: Consumer concept

Related issue(s) Fixes #975

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[Annysah]

Hello @alequetzalli & @derberg, I will love your feedbacks. Thank you!

[github-actions[bot]]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🔴 Performance	44
🟠 Accessibility	88
🟠 Best practices	83
🟢 SEO	90
🔴 PWA	30

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[quetzalliwrites]

AMAZING WORK on your first Concept Doc and nice new diagram! Thank you for your contribution ✨✨✨

Let's get a technical review from folks like @derberg, @fmvilas and/or @smoya first, and once technical feedback is done, I will conduct an editorial review.

[Annysah]

Nice! Left some comments

thought: since we have producer document already in master maybe, maybe it is good it interlink them? So at the end of your document you can add a note like: "yo, subscribers can actually also be producers. Go to this blabla to learn what producer is". and similar note could be added to the producer doc. Thoughts?

Great idea!

[Annysah]

I will make all the requested changes. Thanks @derberg

[Annysah]

Dear @alequetzalli & @derberg, I just updated the content to be in sync with the requested changes

[derberg]

@Annysah heyo, just pinging you as looks like just one tiny change is needed and we can merge

[Annysah]

@Annysah heyo, just pinging you as looks like just one tiny change is needed and we can merge

Thanks @derberg, I will do the update now.

[derberg]

@all-contributors please add @Annysah for docs

[allcontributors[bot]]

@derberg

I've put up a pull request to add @Annysah! :tada: